linux-kernel - Re: [PATCH v2 7/8] drm/msm/a6xx: update a6xx_ucode_check

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Message-ID: <cf60548e-03ae-6a13-2449-9a981a7ab84e@codeaurora.org>
Date:   Mon, 31 May 2021 20:36:11 +0530
From:   Akhil P Oommen <akhilpo@...eaurora.org>
To:     Jonathan Marek <jonathan@...ek.ca>, freedreno@...ts.freedesktop.org
Cc:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Eric Anholt <eric@...olt.net>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Sharat Masetty <smasetty@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        "open list:DRM DRIVER FOR MSM ADRENO GPU" 
        <linux-arm-msm@...r.kernel.org>,
        "open list:DRM DRIVER FOR MSM ADRENO GPU" 
        <dri-devel@...ts.freedesktop.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 7/8] drm/msm/a6xx: update a6xx_ucode_check_version for
 a660

On 5/13/2021 10:44 PM, Jonathan Marek wrote:
> Accept all SQE firmware versions for A660.
> 
> Re-organize the function a bit and print an error message for unexpected
> GPU IDs instead of failing silently.
> 
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
>   drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 36 +++++++++++++--------------
>   1 file changed, 17 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 3cc23057b11d..ec66a24fc37e 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -697,6 +697,11 @@ static bool a6xx_ucode_check_version(struct a6xx_gpu *a6xx_gpu,
>   	 * Targets up to a640 (a618, a630 and a640) need to check for a
>   	 * microcode version that is patched to support the whereami opcode or
>   	 * one that is new enough to include it by default.
> +	 *
> +	 * a650 tier targets don't need whereami but still need to be
> +	 * equal to or newer than 0.95 for other security fixes
> +	 *
> +	 * a660 targets have all the critical security fixes from the start
>   	 */
>   	if (adreno_is_a618(adreno_gpu) || adreno_is_a630(adreno_gpu) ||
>   		adreno_is_a640(adreno_gpu)) {
> @@ -720,27 +725,20 @@ static bool a6xx_ucode_check_version(struct a6xx_gpu *a6xx_gpu,
>   		DRM_DEV_ERROR(&gpu->pdev->dev,
>   			"a630 SQE ucode is too old. Have version %x need at least %x\n",
>   			buf[0] & 0xfff, 0x190);
> -	}  else {
> -		/*
> -		 * a650 tier targets don't need whereami but still need to be
> -		 * equal to or newer than 0.95 for other security fixes
> -		 */
> -		if (adreno_is_a650(adreno_gpu)) {
> -			if ((buf[0] & 0xfff) >= 0x095) {
> -				ret = true;
> -				goto out;
> -			}
> -
> -			DRM_DEV_ERROR(&gpu->pdev->dev,
> -				"a650 SQE ucode is too old. Have version %x need at least %x\n",
> -				buf[0] & 0xfff, 0x095);
> +	} else if (adreno_is_a650(adreno_gpu)) {
> +		if ((buf[0] & 0xfff) >= 0x095) {
> +			ret = true;
> +			goto out;
>   		}
>   
> -		/*
> -		 * When a660 is added those targets should return true here
> -		 * since those have all the critical security fixes built in
> -		 * from the start
> -		 */
> +		DRM_DEV_ERROR(&gpu->pdev->dev,
> +			"a650 SQE ucode is too old. Have version %x need at least %x\n",
> +			buf[0] & 0xfff, 0x095);
> +	} else if (adreno_is_a660(adreno_gpu)) {
> +		ret = true;
> +	} else {
> +		DRM_DEV_ERROR(&gpu->pdev->dev,
> +			"unknown GPU, add it to a6xx_ucode_check_version()!!\n");
>   	}
>   out:
>   	msm_gem_put_vaddr(obj);
> 

Can we squash this patch with the previous one?

-Akhil.